Shares of various Bitcoin mining companies soared after Jane Street, a prominent trading firm, disclosed its investments in these stocks. This announcement not only boosted the individual companies’ stocks but also highlighted the increasing interest in publicly traded mining companies following a period of steady gains.
On Thursday, the US Securities and Exchange Commission revealed that Jane Street holds approximately 5.4% of Bitfarms, 5% of Cipher Mining, and 5% of Hut 8, marking these as passive investments rather than direct involvement or activism in the companies’ operations. Following the news, stock prices saw significant increases ranging from 8% to 13%.
As of market closing on Friday, the stocks reported the following increases:
- Bitfarms (BITF): up 10.68%
- Cipher Mining (CIFR): up 19.73%
- Hut 8 (HUT): up 17.27%
Additionally, other Bitcoin mining stocks like American Bitcoin Corp., IREN Limited, and Hive Digital Technologies, also reported gains.
Jane Street is recognized for its activities in both equity and digital asset markets, and its recent stake is an extension of its previous interests in Bitcoin miners which began in 2023 with investments in Marathon Digital Holdings.
Notably, the announcement followed Google’s acquisition of a 5.4% stake in Cipher Mining earlier in September.
Bitcoin Mining in 2025
The process of Bitcoin mining is crucial for the blockchain, as it involves solving complex problems that confirm transactions and introduce new Bitcoin into circulation. While some solo miners may occasionally strike gold, major companies have come to dominate the field.
Over the last year, many mining companies have significantly outperformed Bitcoin itself in terms of growth, with substantial rises in stock performance. Data indicates that, while Bitcoin has appreciated roughly 73% over the past year, Bitfarms rose nearly 131% and Hut 8 saw an increase of around 211%.
For additional insights, refer to this analysis on Bitcoin mining.
